Bookbinder s extensible glue-block



(No Model.) 2 Sheets-Sheet 1. J. F. GLENN. BOOKBINDERS EXTENSIBLE GLUEBLOCK.

No. 485,760. Patented Nov. 8, 1892.

I ,I I I I I l /0 :,HHIH In I (No Model.)l A 2 Sheets-Sheet: 2. J. P.GLENN. BOOKBINDERS EXTENSIBLE GLUE BLOCK.

No. 485,760. Patented Nov. 8, 1.892.

UNITED STATES PATENT OFFICE.

JAMES FRANCIS GLENN, OF GLENIIAM, NEW YORK.

BOOKBINDERS EXTENSIBLE GLUE-BLOCK.

SPECIFICATION forming part of Letters Patent No. 485,760, dated November8, 1892.

Application tiled April 22,1891. Serial No. 390.026. (No model.)

To all whom, t may concern:

Be it known that I, JAMES FRANCIS GLENN, a citizen of the United States,and a resident of Glenham, Dutchess county, State of New York, butresiding temporarily at Washington, in the District of Columbia, haveinvented certain new and useful Improvements in Bookbinrlers ExtensibleGlue-Blocks; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to lnake and use the same.

My invention relates generally to the art of bookbinding, andparticularly to that branch in which glue and paste are used to securesheets of cloth, paper, and other material together, asin case-makingand in analogous Work. In getting the sheets of material ready forsecurement on the board, sheet, or other material it is customary toarrange the material in a pile, outside face down, so that the glue orpaste can be readily applied to the inside face. As the pile diminishesin height the brush often touches the table and leaves a smear, and it`it comes in contact with the outside face of the sheet (a commonaccident) the sheet is ruined. To save time and trouble in cleaning thetable, binders board is often used as a block, which is soon ruined bythe glue or paste, especially where different-sized cases are made. Thisinvolves a great waste of board.

The object of my invention is to provide an eXtensible block adapted tobe changed to iit the different-sized sheets, and also to raise thelower sheet far enough from the table to prevent the brush from strikingthe table when it slips off the pile, as it often does. In such aconstruction the edges of the sheet will always register with the edgesof the block, and no paste will get on the face ofthe block; and Iprefer to incline the sides of the block inward and downward, so that ifthe brush should slip ott it will not strike the side and clog with gluethe movable parts, which render adjustment to different sizes possible.

The invention therefore consists of constructions and combinations, allas will here inafter be described in the specification and pointed outin the claims, reference being had to the accompanying drawings, inwhich- Figure 1 represents a top plan view of the block extended; Fig.2, a top plan view showing the block closed; Fig. 3, a section on line 33, Fig. 1, the solid base being omitted; Fig. 4, a detail showinga tubeand guide-bars in section and part of a screw in elevation; Fig. 5, asection on line 5 5, Fig. l; Fig. 6, a section on line 6 6, Fig. 5; andFig. 7, a detail of one of the base-blocks.

A represents the entire block, which is preferably formed of fourcomponent parts A', A2, A3, and A4, secured together in any manner whichpermits of the adjustment of the sections. All the sections are providedwith a plate marked, respectively, a', a2, a3, and d, as shown in thedrawings. These plates are of the same size, and when the block isclosed, as shown in Fig. 2, are arranged in a pile with the edgessubstantially registered. When the face A5 of the block is to be madelarger, these plates are moved from each other in dierent directions, asshown in Figs. 1 and 6, the inner corners of each in practice preferablyoverlapping to make the center stronger and also to compel them toreturn in proper order when any size intermediate of largest andsmallest is used. In the present device these plates are secured tobaseblocks B', B2, B3, and B4 in any desired manner, but preferably byoverlapping the sides ot' the block, as shown in Fig. 5, and secured inplace by screws a5, having washers as at the inside corners of theblocks, as shown in Fig. 6. Other screws may also be used at ditterentpoints-say at a7, Fig. 6, where the head of the screw is shown in dottedlinesto strengthen the attachment to the block. When the overlappingparts of the plates are of substantially the same width and length ofthe face of the plates, as shown in Fig. 6, the parts as are providedwith lips to form grooves for parts a9 on the other plates to slide backand forth in. The arrangement of course can be varied by using any ofthe well -known mechanical equivalents. The corners al@ may be square orbeveled; but I prefer the latter, especially when the device is to beused in case-making.

The blocks B B2, B3, and B4 may be of any desired material or form andconnected together in any desired manner. The preferred form is toprovide the blocks with pas- ICO sages and connect them by ways. In thepresent device the blocks are shown with two sets of horizontalYpassages h, arranged at right angles to each other, and one set abovethe other, and the blocks connected together by Ways or rods h', whichin the present device are rigidly held together by a tube h2, secured totheir under side by screws b3, (see Fig. 3,) which are inserted throughopenings b, as shown in Fig. 4.

The tubes b2, opposite each' other, are connected together by aright-and-left screw b5, into the threads of which project the setscrewsh6, that cause the blocks to move to and from each other when the screwis revolved, and lock or hold the sections in the desired position whenset hard against the screw b5. To permit of the blocks coming closetogether, the inner faces 197 are provided with a semicircular groovehs, into which the tubes h2 go when the parts of the block are in theposition shown in Fig. 2. If desired, a plate D may be used tostrengthen the center Iof the block, or rather the top, especially whenthe latter is spread for the larger sizes. The plate can be supported inany desired manner, but I prefer to secu re it to the upper screw b5 bymeans of a slip d, which is countersunk upon said screw to preventlateral movement and secured to the under side of plate D by screws orother retaining devices.

What I claim as new is* 1. A bookbinders glue-block composed of sectionsthe working faces of which normally overlap one another and adjustablysecured together, substantially as described.

2. Abookbinders glue-block composed of 'sides on all of the sections.

sect-ions the working faces of which normally overlap one another andadj ustably secured together and provided with a plate for supportingthe center of the block when the sections are extended, as set forth.

3. A bookbinders glue-block composed of extensible sections, a plate forsupporting the center ofthe block when the sections are extended, andmechanism, substantially as described, for holding the sections in anydesired position.

4. A bookbinders glue-block composed of extensible sections and havingoverlapping 5. A bookbinders glue-block composed of extensible sectionsand having passages, rods in said passages connecting the sections, anda locking device for said sections.

An extensible glue-block for bookbinders, composed of sections connectedtogether and having grooves in the inner faces of each section, andtubes secured to the section-connecting devices and resting in saidgrooves when the sections are brought together, substantially asdescribed.

7. A bookbinders extensible glue-block having passages, rods b fittingWithin the passages and rigidly secured to the tubes b2 by screwsinserted through the openings b4k in said tubes, substantially as shown.

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES FRANCIS GLENN.

Vitnesses:

M. F. HALLECK, FRANKLIN MOORE.

